Airtac SCJ50 Standard Cylinder SCJ50X80-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X80-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø50mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke80 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X80-50
The SCJ50X80-50 is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal 80 mm stroke, delivering 982 N of push force at 0.5 MPa. Its defining feature is the rear-cap adjusting screw, which provides a 50 mm field-adjustable range to fine-tune the stroke end position without removing the cylinder from the machine.
Built on a durable tie-rod construction, this model uses a 20 mm diameter piston rod with an M16x1.5 thread and PT1/4 ports. The adjustable air cushion, with a 21 mm cushion length, decelerates the piston smoothly, while the body length A(SCJ) is 194 mm, making it a compact solution for applications requiring frequent end-stop changes.
Airtac SCJ50 Standard Cylinder SCJ50X80-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X80-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X80-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×80 | Nominal (maximum) stroke length in mm. |
| -50 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ50 Standard Cylinder SCJ50X80-50 Is Used
Commissioning & Setup
The 50 mm adjustment range lets technicians dial in the exact stroke end-stop during initial machine setup without needing to swap cylinders or fabricate external hard stops, saving hours of mechanical work.
Product Format Changeover
On packaging or sorting lines, operators can quickly adjust the cylinder stroke to accommodate different product sizes or box dimensions, reducing line downtime between batches.
Wear Compensation
In clamping or pressing operations, the rear screw can be advanced to take up mechanical wear in tooling or seals, maintaining consistent contact force and extending the service life of the fixture.
Is the Airtac SCJ50 Standard Cylinder SCJ50X80-50 the Right Cylinder?
Choose the SCJ50X80-50 when your process needs a 50 mm adjustable stroke window on an 80 mm nominal cylinder. If you require more force, the SCJ63 series offers 1559 N of push at 0.5 MPa; for a lighter, more compact solution, the SCJ40 provides 628 N. This adjustable-stroke unit is ideal for commissioning and format changes, but if your application only needs a single, fixed stroke, the standard SC50 series is a simpler, cost-effective alternative. For a direct replacement, match the 50 mm bore, 80 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting style.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X80-50 FAQ
At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N. The maximum push force at the 0.9 MPa upper limit is 1767 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area.
Yes, if you need the 50 mm field-adjustable stroke feature. The SCJ50X80-50 has the same bore, rod diameter, and port size as a fixed SC50. Ensure the slightly longer body length A(SCJ) of 194 mm fits your mounting space and that you match the PT port thread and basic mounting style for a drop-in replacement.
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